Photon-counting 1.55 (mu)m optical communications with pulse-position modulation and a multimode upconversion single-photon receiver

摘要

We report single-photon frequency upconversion of multimode light from 1.55 to 0.532 (mu)m and demonstrate an end-to-end optical link that emulates photon-starved communications and atmospheric propagation. Using 64-ary pulse-position modulation and a half-rate serially concatenated turbo code we achieve a decoded efficiency of 0.3 detected photons/bit.